The provisions of Section 8.28.030 do not apply to the use of an orchard or citrus grove heater which:
A. Does not produce unconsumed solid carbonaceous matter at a rate in excess of one gram per minute; and
B. If petroleum or any product thereof is used as a fuel does not produce products of combustion arising therefrom containing unconsumed solid carbonaceous matter in excess of twenty grams per pound of fuel consumed.
(Prior code § 6.04.130 (Ord. 284 § 18, 1947))